The Surveyor and municipal engineer . about 2401b. on the square inch. At62J miles it is just north of Wolverley, and at 68 close toIlagley, reaching the intended Frankley reservoir at 73 miles54 chains. In addition to the two railways above mentioned,Ihe aqueduct crosses the Shrewsbury and Hereford Railwayat 42 miles 10 chains, the Severn Valley Railway at 58 miles5t chains, the l-lafford and Worcester Canal at 62 miles 70chains, and the Haletowen and Bromsgrove Railway at 72miles 2 eliains. In its course it also crosses the rivers Rea andStour, and the Teme a third time. There are altogether
The Surveyor and municipal engineer . about 2401b. on the square inch. At62J miles it is just north of Wolverley, and at 68 close toIlagley, reaching the intended Frankley reservoir at 73 miles54 chains. In addition to the two railways above mentioned,Ihe aqueduct crosses the Shrewsbury and Hereford Railwayat 42 miles 10 chains, the Severn Valley Railway at 58 miles5t chains, the l-lafford and Worcester Canal at 62 miles 70chains, and the Haletowen and Bromsgrove Railway at 72miles 2 eliains. In its course it also crosses the rivers Rea andStour, and the Teme a third time. There are altogether 13J miles of tunnel, 23 miles of cutand ctiver, and 374 miles of iron and steel pipes crossingvalleys under pressure; a total of 73f miles. The meaning of cut and cover is that the aqueduct islaid in ground approximately parallel to and slightly higherthan the hydraulic gradient line, so that an open trench maybe cut, the aqueduct built in it, and the ground filled in andrestored over it to its original condition. In tunnel ani cut. Wye Syphon, Preparing to Lower a Pipe(Febrnary, 1897). and cover the structure consists of blue brick lining on a con-crete backing so far as the invert and side waBs are concerned,the arch being of concrete only. This conduit is laid almost(hronghout with a fall of 1 in 4,000, or about 10 in. in a mile,the exception being in the long tunnels, which have slightlybetter gradients. It will carry, running something under Decembeb 9, 1898.] AND COUNTY ENGINEER. 731 full, 75,0(X),(HX) fjaHois » J. ^ ? ™^ instalment of27,000,000 Gallons a day will flow about 3 ft. deep and witli aspeed of ISO ft. a minute, taking about forty-four Lours in itspassage from tlio Elan to Uirminfrham. In croesinK valleysbelow the liydraulic gradient line the aqueduct will consist atfirst of two cast-iron or steel pipes, with a fall of 3 ft. ina mile, or 1 in 1,700. As the demand for water increases athird, fourth, fifth and sixth pipe of similar size will bo
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgreatbritain, bookyea
